openwrt/target/linux/bcm27xx/patches-5.10/950-0638-ARM-dts-bcm2711-Tune-DMA-parameters-for-HDMI-audio.patch

From 54643c62b6a848bfcfd86ac4eebbea28c0f1902e Mon Sep 17 00:00:00 2001
From: Dom Cobley <popcornmix@gmail.com>
Date: Wed, 28 Apr 2021 16:10:02 +0200
Subject: [PATCH] ARM: dts: bcm2711: Tune DMA parameters for HDMI audio

Enable NO_WAIT_RESP, DMA_WIDE_SOURCE, DMA_WIDE_DEST, and bump the DMA
panic and AXI priorities to avoid any DMA transfer error with HBR audio
(8 channel, 192Hz).

Signed-off-by: Dom Cobley <popcornmix@gmail.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 arch/arm/boot/dts/bcm2711.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/arm/boot/dts/bcm2711.dtsi
+++ b/arch/arm/boot/dts/bcm2711.dtsi
@@ -360,7 +360,7 @@
 			interrupt-names = "cec-tx", "cec-rx", "cec-low",
 					  "wakeup", "hpd-connected", "hpd-removed";
 			ddc = <&ddc0>;
-			dmas = <&dma 10>;
+			dmas = <&dma (10 | (1 << 27) | (1 << 24)| (15 << 20) | (10 << 16))>;
 			dma-names = "audio-rx";
 			status = "disabled";
 		};
@@ -407,7 +407,7 @@
 				     <9>, <10>, <11>;
 			interrupt-names = "cec-tx", "cec-rx", "cec-low",
 					  "wakeup", "hpd-connected", "hpd-removed";
-			dmas = <&dma 17>;
+			dmas = <&dma (17 | (1 << 27) | (1 << 24)| (15 << 20) | (10 << 16))>;
 			dma-names = "audio-rx";
 			status = "disabled";
 		};